Radiation Detection

Hello! I have an old russian 63x63 mm NaI scintillator with a few yellow spots, and I will soon get access to a dry air glovebox. So I would like to try to repair it with a mix of washing and polishing it (https://doi.org/10.1016/0168-9002(87)90900-4). It gives readable spectra, but all the peaks ha...

Hello! I am selling two 14 pin PMT bases, one with 10 MOhm per dynode, and one with 1 MOhm per dynode, both for positive high voltage. They fit pretty much any 14 pin PMT with the "standard" pinout, but not others like the R6231. Screenshot from 2021-01-15 20-42-19.png photo_2021-01-15_20-39-39.jpg ...

Ah, I understand! I am not sure if you can achieve the best possible resolution with LaBr and a Soundcard, as it really wants a short time constant of ~300 to 500 ns. Have you tried Becqmoni? That's where I got my best results with the HPGe. Also, try disabling the IIR filter in theremino, as it jus...

Looks like you have quite the detector collection! I still need to add SrI and CZT to mine.
The resolution of your LaBr looks a bit low, the two peaks around ~950 keV should go down to the baseline.
What time constant and PMT did you use with that one?

Wow, that's an impressive amount of contamination!
I never would have guessed that it surpasses the k40 peak.

Hello Steven,

You can use pretty much any resin, the more aromatic rings the better.
PET and PEN are intrinsic scintillators as well!

Lukas

And if you buy all of that you could also try making scintillators with it ;-)

I have now confirmed that they are alpha sensitive, albeit not by much. The biggest pulse height is caused by betas, unsurprisingly, but gamma is not that much smaller, I guess that's because the scintillator is big enough to actually absorb most of the gammas. Am241 alphas give about 1/10 the pulse...

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Hi Luuk, Thank you for the kind words! I hope many people will try it, as it can be made so much better and become actually useful! Imagine building your own cosmic watch, but for a fraction of the price and as big as you want, and that's just one of many, many applications. I will definitely also t...